clc;%清理命令行窗口
data=readmatrix('GDOP_result.xlsx');%读取excel数据，同目录下
figure(1);% Dilution of Precision(DOP)
%time=0:6:24;
% plot(data(:,1),'k-');
hold on;
plot(data(:,4),'r');
plot(data(:,5),'g');
hold off
xlim([0 17530]);
ylim([0 10]);
xlabel("time/h");ylabel("GDOP");

% [x, y, z] = lla2ecef(118.856947,32.021788,31.634676);